512M05800 Wiseco Piston Kit .080 for Yamaha YZ125 1984 58.00 mm

Wiseco .080 Piston Kit for Yamaha YZ125

This Wiseco .080 piston kit, part number 512M05800, is a 58.00 mm oversize piston assembly built to restore compression and top end performance on a 1984 Yamaha YZ125.

Overview

This Wiseco .080 piston kit for the 1984 Yamaha YZ125 delivers a 58.00 mm oversize bore solution for worn or freshly machined cylinders. The kit is made for riders and rebuilders who need a dependable piston assembly that holds up to two stroke heat and repeated high rpm running. Each Wiseco piston kit is designed to match the YZ125 top end for a clean, accurate rebuild.

Built For Performance

• Forged piston construction for strength under high rpm two stroke loads
• 58.00 mm oversize bore size, identified by part number 512M05800
• Ring, pin, and clip components included for a complete top end swap
• Machined skirt profiles for consistent cylinder wall contact
• Designed as a direct fitment part for the 1984 Yamaha YZ125 engine

Fits These Machines

• for Yamaha YZ125, 1984

On-The-Job Use

• Top end rebuild after a seized or scored piston
• Refresh of a worn cylinder bored to 58.00 mm
• Motocross and trail use where compression and throttle response matter
• Race season teardown and preventive replacement

Specs At A Glance

Good To Know

Q: Does this piston kit need cylinder boring? A: Yes, a .080 oversize piston requires the cylinder to be bored and honed to match the 58.00 mm size before assembly.

Q: Does the kit include rings and pin? A: Wiseco piston kits for this application typically ship with the piston, ring set, wrist pin, and clips for a complete top end install.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.